SA 387 Qib 22 Chav Kawm 2 yog lub siab -lub zog chromium-molybdenum alloy steel phaj tshwj xeeb tsim los siv rau hauv cov hlab ntsha thiab cov boilers uas tsim los rau qhov kub thiab txias. Raws li xyoo 2026, nws tseem yog cov khoom siv tseem ceeb hauv cov roj, roj, thiab kev lag luam petrochemical vim nws qhov kub thiab txias txog li 600 degree.
Sib npaug rau ASME SA387 Qib 22 Alloy Steel Phaj
| BS | EN | ASTM / ASME Cov | DIN |
| 622-515B | 10 ZPO 910 | SA387-22-2 | 10 ZPO 910 |
Specifications rau ASME SA387 Qib 22 Alloy Steel Phaj
| Lub npe | Nominal Chromium Cov ntsiab lus (%) |
Nominal Molybdenum Cov ntsiab lus (%) |
| SA387 Qib 22 | 2.25% | 1.00% |
Tensile Requirements rau ASME SA387 Qib 22 Alloy Steel Phaj Chav Kawm 2
| Lub npe: | Yuav tsum tau: | Qib 22 |
| SA387 Qib 22 | Tensile zog, ksi [MPA] | 75 txog 100 [515 rau 690] |
| Yield zog, min, ksi [MPa] / (0.2% offset) | 45 [310] | |
| Elongation hauv 8 nti. [200mm], min % | ... | |
| Elongation hauv 2 nti. [50mm], min, % | 18 | |
| Txo thaj tsam, min% | 45 ( ntsuas ntawm cov qauv puag ncig) 40 ( ntsuas ntawm cov qauv tiaj tus) |
Cov Khoom Siv Tshuaj Rau ASME SA387 Qib 22 Alloy Steel Phaj
| Element | Chemical Composition (%) | |
| SA387 Qib 22 | ||
| Cov pa roj carbon: | Kev Ntsuas Kub: | 0.05 - 0.15 |
| Product Analysis: | 0.04 - 0.15 | |
| Manganese: | Kev Ntsuas Kub: | 0.30 - 0.60 |
| Product Analysis: | 0.25 - 0.66 | |
| Phosphorus: | Kev Ntsuas Kub: | 0.035 |
| Product Analysis: | 0.035 | |
| Sulfur (max): | Kev Ntsuas Kub: | 0.035 |
| Product Analysis: | 0.035 | |
| Silicon: | Kev Ntsuas Kub: | 0.50 max |
| Product Analysis: | 0.50 max | |
| Chromium: | Kev Ntsuas Kub: | 2.00 - 2.50 |
| Product Analysis: | 1.88 - 2.62 | |
| Molybdenum: | Kev Ntsuas Kub: | 0.90 - 1.10 |
| Product Analysis: | 0.85 - 1.15 |
ua
1. Melting thiab Refining
Ua los ntawm hluav taws xob arc rauv (EAF) ntxiv rau LF (ladle furnace) thiab VD (nqus degassing) kom ntseeg tau siab purity.
Kev tswj nruj ntawm cov tshuaj muaj pes tsawg leeg kom ua tau raws li ASME SA-387 cov cai.
Cov ntsiab lus tseem ceeb: C 0.05–0.15%, Cr 2.00–2.50%, Mo 0.90–1.10%, P thiab S Tsawg dua lossis sib npaug li 0.025%.
2. Kub ua hauj lwm (Rolling / forming)
Cua sov: Reheat ingots los yog billets rau 1210-1270℃nrog 6-9 teev tuav lub sij hawm rau homogenization.
Rolling: Pib dov ntawm 1040-1160 degree, tiav dov ntawm 800-850 degree.
Kev tswj kom txias: Tom qab dov, maj mam txias hauv cov pawg insulated saum toj no 500℃rau 70-80 teev kom tsis txhob tawg thiab ua kom zoo ib yam microstructure.
Kub sib sau (piv txwv li, hau): Kub rau 930-960 degree, tuav 1.0-1.5 min / mm, ces cua txias.
3. Kev kho cua sov
Normalizing + Tempering (yuav tsum tau xa):
Normalizing ntawm 900-960 degree, cua txias.
Tempering ntawm 680-750 degree, cua txias.
Lub hom phiaj microstructure: Ntau dua lossis sib npaug li 90% bainite.
Quenching + Tempering (yeem):
quenching ntawm 900-930 degree, dej txias.
Tempering ntawm 710-750 degree.
Simulated Post-Kev kho cua sov (PWHT): 690 ± 14 degree, tuav lub sijhawm raws li tuab (feem ntau 8-26 teev).
4. Vuam
Siv tsawg-hydrogen electrodes lossis vuam hlau.
Preheat kub: feem ntau 200-300℃(nws txawv nrog tuab).
Interpass kub: Tsawg dua los yog sib npaug rau 350 degree.
Ncej -Kev kho cua sov (PWHT): 675-705 degree, lub sijhawm tuav tsawg kawg nkaus raws li cov khoom tuab.
5. Machining thiab Fabrication
Zoo machinability nyob rau hauv lub normalized thiab tempered mob.
Siv cov cuab yeej ntse thiab nruab nrab txiav ceev.
Tsis txhob overheating thaum lub sij hawm machining los tiv thaiv softening.
6. Kev tshuaj xyuas thiab kev sim
Ultrasonic kuaj (UT) rau daim hlau.
Tensile, cuam tshuam, thiab hardness kuaj.
Kev ntsuam xyuas microstructure.
Hydrogen-induced cracking (HIC) kuaj yog tias xav tau rau kev pabcuam qaub.
daim ntawv thov
1. Cov Kev Lag Luam Tseem Ceeb
Petrochemical & Refining: Qhov no yog qhov feem ntau siv rau cov khoom siv. Nws yog siv los tsim hydroprocessing reactors, desulfurization cov cuab yeej, thiab hloov kho qhov cub. Nws tiv thaiv "kua roj" (muaj hydrogen sulfide) ua rau nws tseem ceeb rau kev tuav cov roj crude thaum lub sij hawm hydrocracking.
Lub Hwj Chim Loj: Ua hauj lwm hauv ultra-supercritical thermal fais fab boilers rau cov khoom xws li lub taub hau lub taub hau, turbine casings, thiab cov khoom siv nruas uas yuav tsum tiv taus qhov kub siab tshaj 25 MPa ntawm qhov kub ntawm ib ncig 500℃.
Coal Chemical Kev Lag Luam: Siv rau lub plhaub gasifier, methanol synthesis towers, thiab coke nruas qhov twg cov cuab yeej yuav tsum tiv thaiv cov roj corrosive (CO, H₂, H₂S) ntawm qhov kub thiab txias.
Nuclear Fais Fab: Pom muaj nyob rau hauv nuclear reactor siab hlab ntsha thiab liquefied roj tso tsheb hlau luam vim nws superior siab - kub lub zog thiab hydrogen corrosion kuj.
2. Common Component Fabrications
Vim nws cov weldability thiab kub tsis kam, nws yog siv los tsim:
Pressure Vessels: Qhov tseem ceeb siv rau khaws cia thiab kho cov txheej txheem xov xwm kom nyab xeeb nyob rau hauv siab.
Thaum tshav kub kub Exchangers: Loj -scale industrial exchangers rau thermal hloov nyob rau hauv hnyav tshuaj.
Piping Systems: suav nrog siab -kub ducting, flanges, li qub, yeeb nkab clamps, thiab fittings.
Industrial Infrastructure: Kev siv cov txheej txheem tawm sab nraud, kev tsim kho choj, thiab kev tsim nkoj.
3. Kev ua haujlwm zoo
Qhov Kub Kub: Ua haujlwm zoo txog 600℃thaum tswj kev ruaj ntseg thiab nkag siab tsis kam.
Strength Profile: Chav Kawm 2 yog qhov zoo dua rau Chav Kawm 1 rau kev thov ntau dua vim tias nws muaj zog tensile (75-100 ksi) thiab tawm lub zog (45 ksi min).
Corrosion Resistance: Cov ntsiab lus chromium muab kev tiv thaiv siab tiv thaiv oxidation thiab xeb, uas yog ib qho tseem ceeb rau lub sij hawm ntev -lub sij hawm durability nyob rau hauv acidic los yog siab - tshav kub ib puag ncig.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
Cov ntsiab lus carbon ntau npaum li cas ntawm SA 387 Qib 22 Chav Kawm 2?
Cov ntsiab lus carbon yog tswj los ntawm 0.15-0.20%, ntsuas lub zog thiab weldability-siab dhau lawm yuav ua rau tawg, qis heev txo lub zog.
Puas yog SA 387 Qib 22 Chav Kawm 2 yuav tsum tau txhaj tshuaj blasting ua ntej vuam?
Yog lawm, txhaj tshuaj blasting tshem tawm xeb, nplai, thiab roj los ntawm qhov chaw, ua kom cov pob qij txha huv huv, txo qhov tsis xws luag, thiab txhim kho vuam zoo.
Qhov elongation tus nqi ntawm SA 387 Qib 22 Chav Kawm 2 yog dab tsi?
Qhov tsawg kawg nkaus elongation tus nqi yog 22% ntawm chav tsev kub, qhia tau hais tias zoo ductility, tso cai rau deformation tsis tawg nyob rau hauv sab nraud rog.
SA 387 Qib 22 Chav Kawm 2 puas tuaj yeem siv rau hauv cov roj av offshore?
Yog lawm, nws yog siv nyob rau hauv offshore siab hlab ntsha thiab pipelines, raws li nws resists siab temps los ntawm cov roj / roj ua thiab nruab nrab marine corrosion nrog kev tiv thaiv.
Qhov txawv ntawm SA 387 Qib 22 Chav Kawm 2 thiab SA 387 Qib 11 yog dab tsi?
Qib 22 muaj cov chromium ntau dua (2.25% vs 1.25%) thiab molybdenum (1% vs 0.5%), muab qhov zoo dua siab -temp lub zog thiab corrosion kuj.
Cov kev xeem twg yog siv rau kev tswj xyuas zoo ntawm SA 387 Qib 22 Chav Kawm 2?
Kev tswj xyuas zoo suav nrog kev ntsuas tensile, kev ntsuas cuam tshuam, kuaj hardness, kuaj pom qhov tsis txaus, thiab tshuaj lom neeg muaj pes tsawg leeg kom ua tau raws li ASTM cov qauv.
SA 387 Qib 22 Chav Kawm 2 puas tuaj yeem ua tau yooj yim?
Nws muaj nruab nrab machinability. Cov cuab yeej ntse, txiav ceev kom raug, thiab cov kua dej txias yog xav tau vim nws cov ntsiab lus alloy thiab siab zog.
Dab tsi yog qhov siab tshaj plaws uas SA 387 Qib 22 Chav Kawm 2 tuaj yeem tiv taus?
Nws nyob ntawm temp thiab thickness; ntawm 500 degree, 20mm phaj tuaj yeem tiv taus ntau dua 10 MPa, haum rau cov khoom siv siab tshaj - siab.
Puas yog SA 387 Qib 22 Chav Kawm 2 muaj nyob rau hauv daim ntawv coil?
Nws yog tsuas yog muab los ua daim hlau thiab ntawv. Coil daim ntawv yog qhov tsawg, vim nws feem ntau yog siv rau cov hlab ntsha loj uas xav tau phaj txiav thiab sib sau.
Lub txee lub neej ntawm SA 387 Qib 22 Chav Kawm 2 yog dab tsi yog tias khaws cia kom raug?
Yog tias khaws cia rau hauv qhov chaw qhuav, noo noo- ib puag ncig dawb nrog tiv thaiv- xeb txheej, nws lub txee lub neej tsis txwv, vim nws tsis degrade nyob rau hauv qhov chaw cia khoom.